Cycle 11 (UPDATED) PIMMS Effective Areas
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Released as of 15 JAN 2009
This release is now the FINAL version of PIMMS for CYCLE 11!
The PIMMS effective areas have been updated to include a new and better model of the HRMA axial effective area, which applies to all configurations. (We have elected NOT to upgrade the ACIS Optical Blocking Filter contamination model, which is under further investigation.) The new hrma files is named "hrmaD1996-12-20axeffaN0008.fits" and is being released with CalDB 4.1.1. An incumbent adjustment of the HETG grating efficiencies is also being released, to maintain the HEG and MEG 1st-order cross-calibration accuracy.
The update to the HRMA model involves a more self-consistent application of small contamination layers on the iridium mirror surfaces, and uses a different method of weighting the HRMA pre-launch calibration data. The result of the change is an improvement in high-temperature cluster modeling with the HRMA/ACIS-S and HRMA/ACIS-I configurations, with derived plasma temperatures more consistent between these two internal configurations, and better cross-calibration with the XMM telescope as well.
The Cycle 11 PIMMS Effective Area Public Information describes how the effective area files were generated, including the new HRMA and HETG files indicated above.
Effective area plots are provided for the following detector configurations:
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